$small-bp: 640px;
$large-bp: 840px;

$ui-opacity: 0.5;
$ui-color: rgba(#fff, $ui-opacity);
$font: 'Russo One', arial, sans-serif;
$letter-spacing: 0.06em;

* {
	position: relative;
	box-sizing: border-box; 
}

html,
body {
	height: 100%;
}

html {
	background-color: #000;
}

body {
	overflow: hidden;
	color: $ui-color;
	font-family: $font;
	line-height: 1.25;
	letter-spacing: $letter-spacing;
}


// Utils
// -------

.hide {
	opacity: 0;
	visibility: hidden;
}

.remove {
	display: none !important;
}

.blur {
	filter: blur(12px);
}



.container {
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
}

.loading-init {
	width: 100%;
	align-self: center;
	text-align: center;
	text-transform: uppercase;
	
	&__header {
		font-size: 2.2em;
	}
	
	&__status {
		margin-top: 1em;
		font-size: 0.8em;
		opacity: 0.75;
	}
}

.stage-container {
	// Keep menu blur contained
	overflow: hidden;
	// Let border width add to size
	box-sizing: initial;
	border: 1px solid #222;
	// Allow border to be hidden when fullscreen
	margin: -1px;
	
	// no need for border on small screens, especially since it causes horizontal scrolling on iOS.
	@media (max-width: $large-bp) {
		border: none;
		margin: 0;
	}
}

.canvas-container {
	width: 100%;
	height: 100%;
	transition: filter 0.3s;
	
	canvas {
		position: absolute;
		// Use lighten blend mode so the sky can be shown lighting up behind the canvases.
		mix-blend-mode: lighten;
		// Chrome mobile always places <canvas> elements on their own composite layer, but Chrome
		// on desktop doesn't, so we'll force it. Compositing makes sense since the canvas elements,
		// but not all UI, redraws each frame.
		transform: translateZ(0);
	}
}

.controls {
	position: absolute;
	top: 0;
	width: 100%;
	padding-bottom: 50px;
	display: flex;
	justify-content: space-between;
	transition: opacity 0.3s, visibility 0.3s;
	
	@media (min-width: $large-bp) {
			visibility: visible;
		
			&.hide:hover {
				opacity: 1;
		}
	}
}

.menu {
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	background-color: rgba(0, 0, 0, 0.42);
	transition: opacity 0.3s, visibility 0.3s;
	
	&__inner-wrap {
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		position: absolute;
		top: 0;
		bottom: 0;
		left: 0;
		right: 0;
		transition: opacity 0.3s;
	}
	
	&__header {
		margin-top: auto;
		margin-bottom: 8px;
		padding-top: 16px;
		font-size: 2em;
		text-transform: uppercase;
	}
	
	&__subheader {
		margin-bottom: auto;
		padding-bottom: 12px;
		font-size: 0.86em;
		opacity: 0.8;
	}
	
	form {
		width: 100%;
		max-width: 400px;
		padding: 0 10px;
		overflow: auto;
		-webkit-overflow-scrolling: touch;
	}
	
	.form-option {
		display: flex;
		align-items: center;
		margin: 16px 0;
		transition: opacity 0.3s;
		
		label {
			display: block;
			width: 50%;
			padding-right: 12px;
			text-align: right;
			text-transform: uppercase;
			user-select: none;
		}
		
		&--select {
			select {
				display: block;
				width: 50%;
				height: 30px;
				font-size: 1rem;
				font-family: $font;
				color: $ui-color;
				letter-spacing: $letter-spacing;
				background-color: transparent;
				border: 1px solid $ui-color;
				
				option {
					background-color: black;
				}
			}
		}
		
		&--checkbox {
			input {
				display: block;
				width: 26px;
				height: 26px;
				margin: 0;
				opacity: $ui-opacity;
			}
		}
		
		@media (max-width: $large-bp) {
			select, input {
				outline: none;
			}
		}
	}
}

.close-menu-btn {
	position: absolute;
	top: 0;
	right: 0;
}

.btn {
	$size: 50px;
	opacity: 0.16;
	width: $size;
	height: $size;
	display: flex;
	user-select: none;
	cursor: default;
	transition: opacity 0.3s;
	
	&--bright {
		opacity: 0.5;
	}
	
	@media (min-width: $large-bp) {
		&:hover {
			opacity: 0.32;
		}
		
		&--bright:hover {
			opacity: 0.75;
		}
	}

	svg {
		display: block;
		margin: auto;
	}
}


.credits {
	margin-top: auto;
	margin-bottom: 10px;
	padding-top: 6px;
	font-size: 0.8em;
	opacity: 0.75;
	
	a {
		color: $ui-color;
		text-decoration: none;
		
		&:hover,
		&:active {
			color: rgba(white, 0.75);
			text-decoration: underline;
		}
	}
}


.help-modal {
	$self: &;
	$duration-in: 0.4s;
	$duration-out: 0.25s;
	$curve-in: ease-out;
	$curve-out: ease-in;
	
	display: flex;
	justify-content: center;
	align-items: center;
	position: fixed;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	visibility: hidden;
	transition-property: visibility;
	transition-duration: $duration-out;
	
	&__overlay {
		position: absolute;
		top: 0;
		bottom: 0;
		left: 0;
		right: 0;
		opacity: 0;
		transition-property: opacity;
		transition-timing-function: $curve-out;
		transition-duration: $duration-out;
	}
	
	&__dialog {
		display: flex;
		flex-direction: column;
		align-items: center;
		max-width: 400px;
		max-height: calc(100vh - 100px);
		margin: 10px;
		padding: 20px;
		border-radius: 0.3em;
		background-color: rgba(#000, 0.4);
		opacity: 0;
		transform: scale(0.9, 0.9);
		transition-property: opacity, transform;
		transition-timing-function: $curve-out;
		transition-duration: $duration-out;
		
		@media (min-width: $large-bp) {
			font-size: 1.25rem;
			max-width: 500px;
		}
	}
	
	&__header {
		font-size: 1.75em;
		text-transform: uppercase;
		text-align: center;
	}
	
	&__body {
		$separator-color: rgba(#FFF, 0.25);
		
		overflow-y: auto;
		-webkit-overflow-scrolling: touch;
		margin: 1em 0;
		padding: 1em 0;
		border-top: 1px solid $separator-color;
		border-bottom: 1px solid $separator-color;
		line-height: 1.5;
		color: rgba(#FFF, 0.75);
	}
	
	// These styles can be adopted as a standard button style if needed.
	&__close-btn {
		flex-shrink: 0;
		outline: none;
		border: none;
		border-radius: 2px;
		padding: 0.25em 0.75em;
		margin-top: 0.36em;
		font-family: $font;
		font-size: 1em;
		color: $ui-color;
		text-transform: uppercase;
		letter-spacing: $letter-spacing;
		background-color: rgba(#FFF, 0.25);
		transition: color 0.3s, background-color 0.3s;
		
		&:hover,
		&:active,
		&:focus {
			color: #FFF;
			background-color: #09F;
		}
	}
	
	&.active {
		visibility: visible;
		transition-duration: $duration-in;
		
		#{$self}__overlay {
			opacity: 1;
			transition-timing-function: $curve-in;
			transition-duration: $duration-in;
		}
		
		#{$self}__dialog {
			opacity: 1;
			transform: scale(1, 1);
			transition-timing-function: $curve-in;
			transition-duration: $duration-in;
		}
	}
}